Saw-setting device.



Nmsom. Patented um'.{23,19004-j .1.- nANz.

SAW SETTING DEVICE.

(Applicagon led Nov. 11, 1899.)

(No Model.)

fvg? f f if UNITED STATES PATENT OFFICE.

JACOB RANZ, OF ST. LOUIS, MISSOURI.

SAW-SETTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 660,310, dated october 23, 1900.

' AppnootiooloaNovomboril,1899. tornino. 736,583. (Nomoaol.)

Setting Devices, of which the following is a full, clear, and exact description, such as will venable others skilled in the artto which it appertains to make anduse the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a top plan view of my improved saw-setting device. Fig. 2 is a vertical longitudinal sectional view through the same on line 2 2, Fig. l, the device being shown in position on the saw. Fig. 3 is a horizontal sectional view on line 3.3, Fig. 2. Fig. 4 is a horizontal sectional view on line 4 4, Fig. 6. Fig. 5 is a horizontal sectional view on line 5 5, Fig. 2. Fig. 6 is a rear end elevational viewof the device. Fig. 7 is a vertical crosssectional view through the device online 7 7, Fig. 2; and Fig. 8 is a vertical sectional view `on noo s s, 2.

This invention relates to a new and useful improvement in a machine for setting the teeth of saws, the object being to provide a `device of the character described which can be easily applied in positionfand readily adjusted to accommodate itself. to the differentsized teeth and one which is compact, simple,

cheap, and can be manually operated with the exertion of comparatively little power.

With these objects in view the invention consists in the construction, arrangement,

`and combination of the several parts, all as will hereinafter be described, and afterward pointed out in the claims. p

In thedrawings, X indicates a portion of a saw-blade upon which my improved machine is mounted for the purpose of setting the teeth thereof, said blade in practice being prefer' ably supported in a vertical position, as by the employment of a vise.

The body portion of the machine consists of a casting A, preferably made of steel and shaped to accommodate the several moving parts. Two jaws depend from this body portion and are adapted to receive the saw-blade therebetween, said jaws being provided on their inner faces with faceplates B and B',

the former of which is preferably fixed in position-by suitable screws, while the latter is capable of moving laterally, being guided in such movement by guide-pins b,secured thereinto, but moving freely in openings in one jaw of the main frame.

When the device is set in position on the saw, a handle C, extending from the side thereof, preferably the left, so that the operator may support the machine in its movement, is turned so that a threaded extension on its. inner end will engage with the faceplate B' to force the same laterally against the saw-blade, clamping the blade in position, but leaving sufficient clearance to permit the face-plates to move along the surface of the blade Without undue friction. A jamnut O locks the handle C 'in position after the face-plate B has .been adjusted. From the above it will be seen that saw-blades of different thicknesses are accommodatedbetween the face-plates, one of which is adj ustable, so as to hold the frame firmly on the blade, sufficient clearance being left to enable the frame to move along the blade, and that means arealso provided forlocking this adjustable face-plate in its position against .the'blade v As shown in Figs. 6 and`7, the face-plates abovel described do not extend to the top of the groove in the lower portion of the frame, but terminate a suicient distance therebeneath to permit the free movement of the laterally displaced or set teeth Without binding, the machine riding lon said teeth.

Mounted in what I willterm the forward end of the lframe is a vertically-disposed shaft or stud D, preferably Aformed with a circumferentially-disposed groove, in which fits a cross-pin d, permitting rotation thereof, but preventing vertical displacement. The upper end of shaft D has a hub E secured thereon by means of a suitable set-screw or `other fastening device, from which hub ex- .tends an operating-handle E.

vided Awith a base-flange e and laterally-pro- Hub E is projecting stops e', which cooperate with adjusting-screws F, threaded in lugs extending from the upper portion of the main frame. These adjusting-screws are provided with suitable knurled heads at their rear ends by which they may be readily rotated, While jam-nuts ssr ICO

f, threaded thereon, are adapted to impinge against the lrear `face of the lug and vlock said screwsin their adjusted positions. By means of a handle E a rocking motion is imparted tothe shaft D, the limits of which motion are di sninishedorncreased byadjusting the nuts f, which cooperate with the stops e', as will` be obvious. The lower end of shaft D terminates slightly above the groove in the bottom of the frame and is provided with projections d', whose cross-sectional shape is best illustrated in Fig. 3.

These projections eX- tend from opposite sides of the shaft, a suffiI cientspace being left therebetween for the passage of the saw-teeth, and when the shaft carrying the projections is rocked said projections alternately come in contact with al` ternate saw-teeth and bend or set such teethi in opposite direct-ions, as shown in Fig. 3, the face-plates B and B acting in this operation to firmly support the blade proper of the sawl at the point where this lateral strain or twist- 5 ing action is applied.

In order to feed the machine along thersawg so that the projections d will properly operate upon the teeth, I provide a double-faced i vcam G on the spindle or shaft D, (see Fig. 5,.) which cooperates with and imparts a recipro-` cating motion to a feedingdevice, which consists of a slidable bar H, provided witha lug` or projection h in the path of the cam, said lug or projection bengforced inwardly toward the shaft D by means of-a compressionspring I.

ceives the inner end of anadjusting-screw J,; whose outer end passes `freely through afbox` normally in its lower .position bya spring Z,

bearing against the upperface-thereof. The tooth and spring are introduced from above and a hollow cap k secured in place to hold said parts inposition.

The body .portionof the bar H isi provided with a threaded socket which yre-` The downward movement of tooth Zis `limitedby the upper end ofI the slot engaging therod J, as seen inFig. 8 In order to adjust the box K backfwardly and forwardly so that the projection d' will strike the saw-tooth at the proper point, I ar` range a screw-bolt M in a projectionextending laterally from box K,\which inner endiis designed to impinge against the rear face of the frame and adjust the boXK relative thereto. The object in adjusting the box K relative to the frame can be readilyiappreciated from the following statement: In Fig-.l2 the feeding-tooth is in engagement with asawtooth and the projection d (on the far side of shaft D) is operating upon a saw-tooth.

There are ten saw-teeth between the feedingtooth of the machine and the saw-tooth being operated upon. If the machine were used on a different saw the base-line of whose teeth were greater or less than the base-line of the teeth shown in the drawings, the feedingtooth L in feeding against the shoulder of the tooth would perhaps so position thelnachine `on the saw that the projection d instead of cooperating with the apex of a tooth would engage two teeth, and therefore it is necessary to adjust box K so that the projections d' will occupy proper positions with respect to "the saw-teeth to `be operated upon. After this adjustment has been secured the screw .I is operated to adjust the projection h toward and from the cam G, so :that the throw of saidcarn .in operating lthe 1box K will so :move said yboiithat `the unachine will be advanced justexactly the distance of onetooth fat each operation of xthehandle E". The handle C is designed to be grasped in the left hand of the operateu, as before stated, and

turned up, so lthat the adjustable `face-plate offers `a 'firm .support for the blade while `its `teeth lare `being operated upon by lthe `projection on the vertical spindle. The `handle iE ris now operated,it being `oscillated to :the full limit of 'its movement, as regulated by the stops F. `Atleachoscillation lof the handle Ethespindle D `is rocked, so that the `projectionsdlcontact with alternate teeth, respectively, ofthe saw. Coincident with the rocltinglof the spindle Dithe cam `.G moves apastlthe projection h, foi-'cingithe box Kto the irear, and tooth L `being iniengagement with the saw-:tooth Ffwill force the machine forwardlythe distance ofone sawtooth, proper adjustment for such advance having been previously made. Before the cam `G moves `the box rearwardly to advance the machine the projection CZ will lhave `perform edits work in setting itstoothland `-will beimoved out of l the way1oftheteeth,ithe opposite projection coming in position tto operate on the `next tooth Ain `advance at about thetime :that ithe Eprojection `hislridingdown the face of Icam kG-at ornearlthe `completion of'its 1inalorinward movement. "llhis `inward or `forward movementof box K results from the action ofvspringiI, andtooth Lin such forward moverment rides over a `saw-ltooth, compressing spring Zin such action, as is well understood. From the above it willbe not-ed that themachine .is kautomatically advanced along .the saw, the feeding-tooth making a complete vibration of each stroke of the lhandle E', whether forward or backward, andlthat each strokeof said operating-handlecauses one of the setting projections to engage with a sa- `toothand `set said tooth laterally at a greater or less angle, depending upon the point ol' arrest of `the handle, determined by the adjustment of theboltsF. :In thismanner, the

`partsbeingaproperly adjusted beforehand, alll thatis `necessaryto setthelteeth of a'saw, the machinebeing placed in positionfisto oscil- IOO late the handle E', the machine automatically feeding itself forward and leaving practically nothing for the operator to do but work the handle E.

The frame A is preferably cut away, as at a, in order that the operator can see how and where the projections d operate upon the sawteeth in order that the bolts F, J, and M may be properly adjusted.

Vith respectto the axis of rotation of the rocking or oscillating shaft D the projections d' move in an arc of a circle; but by reason of the forward travel of the device this arc is extended, so that the projections travel in a path described by a cycloidal groove. This is of great advantage in that When the projections engage With the teeth to bend them laterally the bend imparted to said teeth is nota straight angle starting from the baseline, but is in the form of a groove both laterally, as shown in Fig. 6, and rearwardly, as shown in Fig. 3, giving to the teeth a twisted appearance. By this formation should the apices of the teeth become worn a cutting edge would still remain, While in the straight angular formation, the angle starting from the base-line, the wearin g of the apices of the teeth detracts from the cutting qualities of the saw in proportion to the cutting edge worn off. This is quite serious at times, especially when a Wood-saw strikes metal, as a nail, said metal tending to strip the saw-teeth of their effective cutting edges.

I am aware that minor changes in the arrangement, construction, and combination of the several parts of my device may be made and substituted for those herein shown and described Without in the least departing from the nature and principle of my invention.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, is-

l. In a saw-setting machine, the combination with a frame, ot' the setting mechanism mounted in said frame, said frame being provided with a groove in its lower face, across which the setting mechanism operates, faceplates arranged in. said groove and extending on each side of the setting mechanism, said face-plates forming substantially a T-shaped groove, in the vertical member of which the body of the saw-blade is located, while the set teeth traverse the enlarged space, and means for adjusting one of said face-plates to accommodate different thicknesses of sawblades; substantially as described.

2. In a saw-setting machine, the combination with a frame, of a rocking shaft mounted therein and provided with projections extending from opposite sides of the end of said shaft, the working faces of said projections being substantially parallel to the axis of rotation of said shaft, and a handle for rocking said shaft; substantially as described.

3. In a saw-setting machine, the combination with a grooved frame, of arocking shaft mounted in said frame, projections d extending from the end ofsaid shaft and adapted to traverse the grooves to set the saw-teeth, means for adjustably limiting the travel of said setting device across such groove, and a handle for operating said shaft; substantially as described. j

4. In a saw-setting machine, the combination with a grooved frame, of a rocking shaft mounted therein and carrying setting projec- `tions d on its end, which projections are arranged diametrically opposite each other, and partially traverse the groove in operation, means for arresting and adjustably limiting the motion of said shaft to control the throw of said projections, and a feeding mechanism operated by said shaft; substantially as described.

5. In a saw-setting machine, the combination with a grooved frame, of a shaft mounted in said frame in axial alinement with the groovein said frame, setting devices arranged at one end of said shaft, a cam on the other end of said shaft, and a feeding mechanism operated by said cam; substantially as described.

6. In a saw-setting machine, the combination with a frame provided with a groove in its under side, of a rocking shaft mounted in the front end of said frame and in axial alinement with said groove, setting devices on the inner end of said shaft which partially traverse the groove in the frame, a cam arranged on said rocking shaft, a sliding bar lnounted in the frame and coperating with said cam, a spring for holding said bar forwardly against thecam, and a yielding tooth arranged on the rear end of the bar and proj ectinginto the path of the teeth of the saw received by the groove in the frame, substantially as described.

7. In a saw-setting machine, the combination with a frame, of a shaft or spindle carrying setting devices, a cam arranged on said shaft, a sliding bar provided with a-projection in the path of said cam, a yielding tooth carried by said bar, and means for adjusting the distance between said tooth and the projection in the path of said cam; substantially as described.

8. In a saw-setting machine, the combination with a shaft carrying saw-setting devices, a cam on said shaft, a sliding bar provided with a projection in the path of said cam, a springfor forcing said bar inwardly toward the shaft, a bolt having a threaded connection with said bar, and a spring-pressed tooth carried by said bolt; substantially as described.

9. In a saw-setting machine, the combination with a setting device, of a cam which is operated in connection therewith, a feeding mechanism actuated by said cam, said feeding mechanism including the projection in the path of the cam, a spring-pressed tooth, means for adjusting the distance between said tooth and the project-ion in the path of the cam, and means for bodily adjusting the tooth and said projection; substantially as described.

10. In a saw-setting machine, the combina- IIO tion with setting devices, of a cani operated in connection therewith, a feeding mechanism cooperating with said cam, said mechanism comprising a projection in the path of movement of the cam, a tooth, means for adjusting said tooth toward or from the saWsetting device, and means for adjusting the projection toward or from its operating-cam; substantially as described.

l1. In a saw-setting machine, the combina tion with a grcoved frame for receiving the saw to be set, of a shaft mounted in said frame and carrying projections for alternately engaging the different teeth of the saw to be set, an operatinghandle attached to said shaft, means for adj ustably limiting the rotary JACOB RANZ.

Witnesses:

WM. H. SCOTT, A. S. GRAY. 

